Can anyone explain the Aharonov Bohm effect in quantum dots?

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In summary, Aharonov-Bohm oscillation is a phenomenon in quantum mechanics where a charged particle is affected by a magnetic field even when it is in a region where the magnetic field is zero. It was first predicted by Yakir Aharonov and David Bohm in 1959. The cause of Aharonov-Bohm oscillation is the interference between two different paths that an electron can take, which is affected by the presence of a magnetic field. This phenomenon has various practical applications in quantum computing, sensing, and metrology. It has also been used to study the properties of materials and to test fundamental principles of quantum mechanics. The Aharonov-Bohm oscillation and the Aharonov-Bohm effect
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ordinary_girl
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can anyone explain to me what is Aharonov Bohm? I read it in wikipedia but I'm still blur :cry:
How can we see this effect in quantum dots?

For example: GaSb quantum dot in GaAs (holes strongly confined in GaSb, electron is loosely bound due to Coulomb interaction)

Any help/explanation/correction is highly appreciated.
 
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I wish I could help but I have never heard of that before.
 
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The Aharonov-Bohm effect is a quantum mechanical phenomenon that occurs when an electrically charged particle is influenced by a magnetic field, even when the particle itself does not directly interact with the magnetic field. This effect was first proposed by Yakir Aharonov and David Bohm in 1959 and has since been observed in various systems, including quantum dots.

In quantum dots, which are tiny semiconductor structures, electrons and holes (positively charged particles) are confined in a small region by potential barriers. These particles behave like waves and can interfere with each other, leading to interesting quantum effects. When a magnetic field is applied to the quantum dot, the electrons and holes experience a phase shift in their wave functions, which can result in interference patterns.

In the case of GaSb quantum dots in GaAs, the holes are strongly confined in the GaSb region, while the electrons are loosely bound due to Coulomb interaction. This means that the electrons have a higher probability of being found in the GaSb region, where the magnetic field is stronger. As a result, the electrons experience a larger phase shift compared to the holes, leading to an asymmetric interference pattern.

To observe this effect, researchers can measure the current passing through the quantum dot as a function of the applied magnetic field. The current will show oscillations, with peaks and valleys, which are a direct result of the interference between the electrons and holes.

In summary, the Aharonov-Bohm effect in quantum dots is a manifestation of quantum interference between confined electrons and holes in the presence of a magnetic field. Its observation requires precise control and measurement of the quantum dot system, and it has important implications for our understanding of quantum mechanics.
 

What is Aharonov-Bohm oscillation?

Aharonov-Bohm oscillation is a phenomenon in quantum mechanics where a charged particle is affected by a magnetic field even when it is in a region where the magnetic field is zero.

Who discovered Aharonov-Bohm oscillation?

Aharonov-Bohm oscillation was first predicted by Yakir Aharonov and David Bohm in 1959.

What is the cause of Aharonov-Bohm oscillation?

The cause of Aharonov-Bohm oscillation is the interference between two different paths that an electron can take. This interference pattern is affected by the presence of a magnetic field, even if the electron does not directly pass through the magnetic field.

What are the practical applications of Aharonov-Bohm oscillation?

Aharonov-Bohm oscillation has various applications in quantum computing, sensing, and metrology. It has also been used to study the properties of materials and to test fundamental principles of quantum mechanics.

How does Aharonov-Bohm oscillation differ from Aharonov-Bohm effect?

The Aharonov-Bohm oscillation and the Aharonov-Bohm effect are closely related, but they are not exactly the same. The effect refers to the phase shift of a charged particle due to a magnetic field, while the oscillation refers to the periodic variation of this phase shift as the particle's energy changes. In other words, the effect is a static phenomenon, whereas the oscillation is a dynamic one.

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